Air-cooled wall



Julyv 5 I1927- n.14. KERR AIE COOLED WALL Original Filed June 1 2, 1919.

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INVENTOR 4MM/Zai Patented July 5, 1927.

UNITED STATES 1,634,291 PATENT OFFICE.

HOWARD J. KERK, OF BAYONNE, NEW JERSEY, ASSIGNOR T0 THE BABCOCX & WILCOX COMPANY, OF BAYONNE, NEW JERSEY, A CORPORATION OF NEW JERSEY.

AIB-CooLnD WALL.

Original application filed June 12, 1919, Serial No. -303,671. Divided and this application led April 17,

` 1923. Serial No. 632,692.

My invention consists of certain novel parts and combinations of parts particularly pointed out inthe claims.

The following is a description of an apparatus for Ventilating a furnace wall embodying my inventionin the form at present preferred by me, but it'will be understood that various modifications and changes may be made therein without .departingfroin the spirit of my invention and without exceeding the scope of my claims:

My present application is a division of my prior application, Serial No. 303,671, which was 4filed in the Patent Office on or about June 12, 1919, Patent Number 1,510,680, October 7, 1924. I

My invention will best be understood by reference to the accompanying drawings in which, Figure 1 is a Vertical section through a furnace wall construction embodying my invention; Fig. 2 is a side elevation of the wall shown in Fig. 1 and taken from the in-l terior of the furnace; Fig, 3 is a section taken on the line 3-3 of Fig. 1, and Figs. 4 and 5 are detail sectional views illustrating modifications of the construction for anchoring the'supplemental wall in position.

Like reference characters indicate like parts throughout the various views.

In accordance with the invention covered by my present application, the furnace wall, which I have indicated generally at 10, coniprises a main wall 10d and a supplemental wall 10e, which protects the lower portion of the main wall. The supplemental wall is supported, inwhole or in part, on the wind box 12c of the forced blast underfeed stoker 11, while the main wall is supported on the Ventilating box 31. The` sides of the ventilating'box may be formed of channel irons 32, the flanges of which project inwardly, as indicated, the ends of the boxes being vclosed by anged plates 33 (see Fig. 3). The Ventilating4 boxes may. be Secured at their ends to columns 34 or, if the boxes are made in sections, they may be supported on a number of struts.

In order to cool thev supplemental wall 10 and the lower portion of the main wall 10, the supplemental wall is provided with open-- V ings 35into which project pipes'36 connected to theventilating box 31, the passages in the wall thus furnishing communication between the Ventilating box and the interior of the furnace chamber. Similarly, the lowerK portion of the main wall 10l is provided with4 openings37, L-sha'ped in form, into which project pipes 38, as best shown in Fig. 2, the

pipes being connected to the Ventilating boxes 31. The Ventilating box in this case is connected by a pipe 39 to the air chamber .40 of the Stoker. The said pipe preferably 'tilating box and wall and thereby provide for expansion and contraction. In the construction shown in Fig. 3, the ends of the pipes are split and bent outwardly, while in Fig. 4 a flange 41a is formed integral with the end of the pipe 36 and engages a notch 42a in the wall. In the construction shown in Fig. 5, the flange 41b is formed on a sleeve or thimble, which is secured at the end of the pipe, the iange engaging a notch 42b formed in the wall.

The pipes 36 and 38 ai'e surrounded by grouting or other material, as indicated in Fig. 1.

In accordance with my invention, the supplemental wall may readily be renewed without disturbing the main furnace wall. Such a construction is particularly advantageous where a forced blast underfeed Stoker of the character illustrated is used, and where there is present a swirling or vortex action of the gases produced through the effect of the forced blast which enters through the tuyres near the fron-t of the furnace and the form of the fuel bed resulting from the underfeed method-of supplying the coal, which causes the depth of the fuel bed to be greater a short distance from the wall than it is directly against and near the front wall. Where such a swirling or vortex action of the gases vis produced, it is likely to result in the erosion of the lower portion of the furnace wall.-

the wall without disturbing` the remainder thereof. The' supplemental wall which 1s used in accordance with my` invention, protects both the Ventilation box and the lower portion of the main wall and, in case of erosion, may readily be renewed.

lf claim ll. ln combination, a furnace wall comprising a main wall and ya supplemental wall,

a stoker comprising a wind box, a ventilat-` formed with Ventilating passages, tubes extending from said Ventilating box into said passages, the wall being formed with notches surrounding said openings and the tubes being provided with projections engaging said notches.

fln combination, a Ventilating box, a

formed with Ventilating passages, tubes extending from said Ventilating box into said.

passages, the wall being formed with notches surrounding said openings and the tubes being provided with projections engaging said notches, the arrangement being such that said projections have play within said notches whereby the wall is anchored to the box with a limited amount of movement between the two.

4. In combination, a Ventilating box forlned in sections, a furnace wall disposed adjacent said box andk formed with ventilat- Qing passages, tubes extending from said Ventilating box into said passages, the wall being formed with notches surrounding said openings, and the tubes being provided with projections engaging said notches.

5. A furnace wall construction comprising a main wall and a supplemental wall, a Ventilating box disposed beneath the main wall and forming a support therefor, the supplemental wall being disposed between the Ventilating box and the furnace chamber.

6. A furnace wall construction comprising a main wall and a supplemental wall, a Ventilating box disposed beneath the main wall and forming a support therefor, the

supplemental wall being disposed between v the Ventilating box and the furnace chamber and being formed with passages for conducting air from said Ventilating box to the furnace chamber..

7. A furnace wall construction comprising a main wall and a supplemental wall, a Ventilating box disposed beneath theV main Wall and forming a support therefor, the supplemental wall being disposed between the Ventilating box and the furnace chamber,

and means for securing said supplementaly Lesesaal wall to the 'Ventilating box, both the main wall and the supplemental wall being provided with Ventilating passages, and means for conducting air from said Ventilating box to said passages.

8. A furnace wall construction comprising a main wall and a supplemental wall provided with Ventilating passages, a Ventilating box disposed beneath the main wall provided with Ventilating passages com municating with said Ventilating box for cooling both of said walls by the air from said box, and associated means for anchoring said supplemental wall to said Ventilating box.

10.* In a furnace, a forced blast underfeed Stoker, a front furnace wall structure comprising a main furnace wall, a Ventilating box located beneath said wall, a readily removable supplemental wall located between said Ventilating box and the furnace, and means for supplying cooling air to said Ventilating box, each of said walls being providedl with Ventilating passages communicating with said Ventilating box for cooling both of said wallsby the air from said box.

11. In a furnace, a forced blast underfeedI stoker, a front furnace wall structure comprising a main furnace wall, a Ventilating box located beneath said wall, a readily removable supplemental Walllocated between said Ventilating box and the furnace and supported on the wind box thereof, and means for supplying cooling air to said ventilating box, each of said walls being provided with Ventilating passages communieating with said Ventilating box for cooling both of said walls by the air from said box.

12. A furnace wall construction comprising a main wall, a supplemental wall 1ocated on the furnace side of the main wall for protecting the lower portion of the main wall from the heat of the furnace, said supplemental wall being provided with openings for admitting air to the furnace and for cooling the wall, -and pipes or ducts for admitting air to the openings, said pipes or ducts being constructed and arranged to hold thesupplemental wall in alignment. A HOWARD J. KEER. 

